This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A177089 #9 Jul 14 2017 17:19:26 %S A177089 0,1,5,6,7,10,12,13,17,19,20,22,25,26,27,28,30,32,33,34,37,39,40,42, %T A177089 43,44,46,47,49,50,51,52,53,54,56,57,61,62,63,65,66,67,68,72,73,74,75, %U A177089 77,78,79,80,82,83,84,85,87,88,89,90,91,92,93,94,95,96,97,99,100,101,102 %N A177089 Numbers n >= 0 such that n^3-n-1 is not prime. %H A177089 Robert Israel, <a href="/A177089/b177089.txt">Table of n, a(n) for n = 1..10000</a> %p A177089 remove(n -> isprime(n^3-n-1), [$0..1000]); # _Robert Israel_, Jul 14 2017 %o A177089 (PARI) isok(n) = !isprime(n^3-n-1); \\ _Michel Marcus_, Jul 14 2017 %Y A177089 Cf. A126421. %K A177089 nonn %O A177089 1,3 %A A177089 _Vincenzo Librandi_, Jun 05 2010 %E A177089 Checked by _Jud McCranie_, Jun 16 2010 %E A177089 0 and 1 added by _R. J. Mathar_, Jun 18 2010